I wish I knew that before buying one, as I would have looked at each window sticker and selected one after that. But, I got lucky and am after that. Even the two others I considered were 5/12.

By the way, if E85 is so vastly inferior in fuel economy to E10, does that mean E10 is much inferior to E0?

By energy content E10 is roughly 3% less energy dense than E0, but some people have reported between a 5%-10% less mpg drop if and when they were able to find E0 fuel to compare. Its just a little bit hard to come by these days since they are trying to force more and more EtOH into regular gasoline to "wean" us from the dependance on foreign oil, reguardless of the fact that it takes oil to grow the crops and to power the equipment that harvests them, so by some calculations its a net energy loser rather than a net benefit.

The cost would have to be greater than 30% less than E10 for E85 to be worth the approximately 1/3 hit in miles per gallon, but usually at most its less than 10% less expensive around here at best, which means its a big waste of money.